On Apr 27, 2010, at 6:55 PM, Graham Cox wrote:
Here's the problem: Any tasks on the undo stack that refer to a particular target must be removed when that target is dealloced.
I don't know your app, but this sounds backwards to me. Don't tasks/ nodes need to be kept around for as long as an undo item refers to them? Otherwise, what happens when the user tries to undo/redo that step?
In other words, I would expect that an undo item would have strong references to the tree nodes it affects.
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